AI Math SolverAn acute angle measures less than 90 degrees. Learn the definition, how acute angles compare to right and obtuse angles, and how they appear in triangles.
Solve it with the AI Math SolverAngles are classified by size. An acute angle is smaller than a right angle (90°), an obtuse angle is larger, and angles over 180° are reflex.
A triangle whose three angles are all acute is itself called acute. Because the angles sum to 180°, each one in an acute triangle must be under 90°.
An acute angle measures less than 90 degrees. Angles exactly 90° are right angles, and those over 90° (but under 180°) are obtuse.
All three of a triangle's angles add to 180°. An acute triangle is one in which every angle is acute — all three under 90°.